Pneumatic Fender Selection Guide
Vessel Dynamics: Vessel displacement, length overall (LOA), and approach speed.
Berthing Geometry: Contact angle during berthing and available installation space.
Performance Limits: Required energy absorption capacity vs. maximum allowable reaction force.
Environmental Impact: Wave action, tidal range, and current velocity.
Engineer's Note: Different marine operations create distinct technical requirements. A fender optimized for Ship-to-Ship (STS) transfer requires different performance and stability characteristics than a fender installed at a fixed jetty or terminal.
Performance Data & Mechanics
Understanding Energy Absorption, Reaction Force, and Compression Curves
|
Key Metric |
Description |
Engineering Significance |
|
Energy Absorption |
The kinetic energy absorbed by the fender during vessel impact. |
Prevents hull and dock damage during berthing. |
|
Reaction Force |
The maximum force exerted back onto the vessel hull and berth structure. |
Must remain below allowable structural limits. |
|
Compression Ratio |
The relationship between deflection depth and internal air pressure rise. |
Determines the overall non-linear performance curve. |
ISO 17357 Standard & Compliance Guide
Structural & Material Standards: Mandates specific tensile strength and elongation limits for outer/inner rubber and reinforcement cord layers.
Pressure Testing Protocols: Strict guidelines for internal pressure tests, including initial internal pressure and burst pressure margins.
Third-Party Verification: Quality assurance protocols aligned with global classification societies.
Fender Construction & Material Technology
Outer Rubber Layer: Formulated for extreme UV, ozone, and abrasion resistance to protect internal layers against seawater degradation.
Reinforcement Cord Layers: High-tensile synthetic tire cords arranged at optimal angles to maintain structural integrity under internal pressure and shear forces.
Inner Rubber Layer: Specialized impermeable rubber compound engineered to prevent air pressure loss over long-term deployments.
End Fittings & Hardware: Heavy-duty, hot-dip galvanized or stainless-steel flanges, shackles, and chain-tyre nets for maximum corrosion resistance.
Marine Application Environments
Tailored Solutions Across Sector Demands
Ship-to-Ship (STS) Transfers: Requires controlled energy dissipation, continuous stability, and reliable distance management between vessels operating in open seas.
Ports & Fixed Terminals: Designed for high-frequency berthing cycles, varied tide levels, and strict reaction force limitations on quay walls.
Offshore & Floating Structures: Built to handle dynamic, continuous multi-directional loading caused by wave and wind action on FPSOs and offshore platforms.
Fender Selection & Engineering Checklist
Information Required Before Technical Evaluation
To receive an accurate engineering recommendation and quotation, please prepare the following operational parameters:
Vessel Details: Maximum displacement (DWT/Displacement Tonnage) and length overall (LOA).
Berthing Parameters: Max berthing velocity and max approach contact angle.
Site Conditions: Water depth, tidal variation, and current/wave exposure.
Structure Limits: Maximum allowable reaction force on quay or vessel hull.
Configuration Preference: Net-type (Chain-Tyre Net) or Sling-type fenders.